Welcome to Hollywood. The place where you can eat as much rubbish as you want, celebrate birthday after birthday, yet still look young and thin.

And, most ­importantly, make sure those selfies are absolutely perfect.

And it’s all thanks to a pioneering new injection that has just been approved by the Food and Drug Administration here in Los Angeles.

Basically, a bunch of cleverclogs have invented a new treatment called Kybella. It promises to rid you of your double chin without having to resort to a diet of kale or disgusting spinach-based juices.

It will soon become legal for anyone to be treated with this deoxycholic acid by approved plastic surgeons – and it’s already as popular as Botox.

And trust me, Botox is just as common as a hot meal here, so it’s hardly surprising that Kybella’s waiting list is as long as LAX’s runway.

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While it doesn’t provide instant results – you need six-monthly injections to get rid of under-chin flab – it is the hottest new fat-fighter to hit Tinseltown.

I’m sure many are whooping with joy. This means they can carry on scoffing In-N-Out burgers in a town where fast food is as popular as cosmetic surgery.

And there are even more formidable ways of ­slimming on their way, and that’s without going anywhere near a treadmill.

But let’s stop for a second here. Is this really a good thing? Like, really?

No. In a place where looking thin, tanned and about 16 is the only way to get on, it’s encouraging a very unhealthy way of life.

I mean surely that age-old theory of eating a sensible diet and taking a few trips to the gym is the best way to stay in shape?

Or are Hollywood’s great and good just far too great to do that? I reckon so...